Accuracy, Precision, and Trending Ability of Electrical Cardiometry Cardiac Index versus Continuous Pulmonary Artery Thermodilution Method: A Prospective, Observational Study

Figure 2

Polar plot analysis. In the polar plot, the distance from the centre represents the magnitude of the change in CI, whereas the angle with 0° line refers to its direction. Increases and decreases in CI are shown together in the so-called “half-moon” design. The mean change in CI (mean ΔCI) was used, with a 10% exclusion zone. Ideally, the mean angle of all data points is 0°, with at least 95% of all data points within the −30° to 30° sector (small dotted lines). Angular bias and radial LOA are depicted (solid line and thick dotted lines).